22961278 has 4 divisors (see below), whose sum is σ = 34441920. Its totient is φ = 11480638.

The previous prime is 22961273. The next prime is 22961293. The reversal of 22961278 is 87216922.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22961273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5740318 + ... + 5740321.

It is an arithmetic number, because the mean of its divisors is an integer number (8610480).

Almost surely, 2^22961278 is an apocalyptic number.

22961278 is a deficient number, since it is larger than the sum of its proper divisors (11480642).

22961278 is a wasteful number, since it uses less digits than its factorization.

22961278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11480641.

The product of its digits is 24192, while the sum is 37.

The square root of 22961278 is about 4791.7927751521. The cubic root of 22961278 is about 284.2270138210.

The spelling of 22961278 in words is "twenty-two million, nine hundred sixty-one thousand, two hundred seventy-eight".